Trailing assembly, towing device and operation machine

Abstract

The invention relates to the field of agricultural operation machinery, and discloses a towing assembly, a towing device and operation machinery. The pull-hanging head is arranged in the pull-hanging gear piece in a penetrating mode in the front-back direction, and the first elastic stopping structure is arranged between the front end of the pull-hanging head and the front side portion of the pull-hanging gear piece so that the front end of the pull-hanging head can be elastically stopped on the front side portion of the pull-hanging gear piece backwards; and the second elastic stop structure is arranged between the rear end of the pull head and the rear side part of the pull gear piece, so that the rear end of the pull head is elastically stopped on the rear side part of the pull gear piece forwards. According to the towing assembly, the towing device and the operation machine, by arranging the first elastic stop structure and the second elastic stop structure, the axial free gap of the towing gear piece and the towing head under the non-towing condition can be eliminated, the service life is prolonged, and noise is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of agricultural operating machinery, and specifically relates to a towing assembly, a towing device and an operating machinery. Background Art

[0002] As the degree of agricultural mechanization continues to expand, users' demand for tractor configuration is also increasing. Tractors are no longer just vehicles for field operations. When tractors are attached to trailers, they are also used as a means of transporting grain and other things. Different countries have different regulations on tractors. EU regulations allow tractors to be used as road transport tools, while domestic tractors are used as non-road transport tools. Due to the large shaking of tractors during operation, existing trailers will generate a lot of noise, which seriously affects the operating experience of operators. Summary of the invention

[0003] The purpose of the present application is to provide a towing assembly, a towing device and an operating machine, which can effectively reduce noise during the operation process.

[0004] In order to achieve the above-mentioned object, the present application provides a trailer assembly on one hand, which includes:

[0005] Trailer gear;

[0006] A trailer head is inserted into the trailer gear member along the front-rear direction;

[0007] A first elastic stop structure is arranged between the front end of the towing head and the front side of the towing stopper so that the front end of the towing head elastically stops backwards on the front side of the towing stopper;

[0008] The second elastic stop structure is arranged between the rear end of the towing head and the rear side of the towing stopper so that the rear end of the towing head elastically stops forward on the rear side of the towing stopper.

[0009] In some specific embodiments, the towing head includes a towing portion and a connecting shaft portion, the connecting shaft portion is inserted into the towing gear, the first elastic stop structure is arranged on the axial front end of the connecting shaft portion, the towing portion is connected to the axial rear end of the connecting shaft portion and is located behind the towing gear, and the second elastic stop structure is arranged between the front end of the towing portion and the rear side of the towing gear.

[0010] In some specific embodiments, the axial front end of the connecting shaft portion is provided with a first annular groove and a second annular groove arranged at intervals in the front-to-back direction, the first elastic stop structure includes an elastic retaining ring, a fixed circular ring and an axial retaining ring, the elastic retaining ring is sleeved on the first annular groove and abuts axially rearward against the front side of the trailer gear, the fixed circular ring is sleeved on the radially outer side of the elastic retaining ring, and the axial retaining ring is arranged on the second annular groove and is located in front of the elastic retaining ring.

[0011] In some specific embodiments, the towing gear is provided with a mounting cylinder for the connecting shaft portion to pass through, and a plurality of limit holes are arranged at circumferential intervals on the rear end surface of the cylinder wall of the mounting cylinder, and the second elastic stop structure includes a ball and a second elastic reset member arranged in each of the limit holes, and a plurality of circumferential limit grooves are arranged at circumferential intervals on the front end surface of the towing portion, and the plurality of circumferential limit grooves are arranged one by one in alignment with the plurality of limit holes, and the connecting shaft portion is rotatably passed through the mounting cylinder, and the ball can be clamped in the circumferential limit groove under the elastic force of the second elastic reset member.

[0012] In some specific embodiments, the rear side of the trailer gear is connected to a trailer head, the side of the trailer gear along the left and right directions is provided with a side hole, the upper part of the trailer gear is provided with an upper hole, and the trailer assembly further includes:

[0013] An operating handle, disposed in the upper hole and movable in an up-and-down direction;

[0014] A locking member, disposed in the side hole and capable of extending out of the side hole in a left-right direction or retracting into the side hole;

[0015] An intermediate transmission assembly is arranged on the trailer gear member, one end of the intermediate transmission assembly is connected to the inner end of the operating handle, and the other end is connected to the inner end of the locking member;

[0016] When the operating handle moves upward, the intermediate transmission assembly can drive the locking member to retract into the side hole; when the operating handle moves downward, the locking member can be reset and extend out of the side hole.

[0017] In some specific embodiments, the intermediate transmission assembly may include:

[0018] The rotary connecting rod comprises a first rod portion and a second rod portion connected to each other, the connecting portion between the first rod portion and the second rod portion is rotatably connected to the towing gear, the end of the first rod portion away from the connecting portion is provided with a first strip hole extending axially thereof, the inner end of the operating handle is movably connected to the rotary connecting rod through a first pin movably arranged in the first strip hole, the end of the second rod portion away from the connecting portion is provided with a second strip hole extending axially thereof, and the inner end of the locking member is movably connected to the rotary connecting rod through a second pin movably arranged in the second strip hole;

[0019] The first elastic return member is arranged in the side hole, one end of the first elastic return member abuts against the towing gear member, and the other end of the first elastic return member abuts against the inner end of the locking member.

[0020] In some specific embodiments, the locking member may be a locking pin shaft, the inner end of the locking member includes a hollow cylindrical cavity, the first elastic reset member is inserted into the hollow cylindrical cavity, the upper cylindrical wall and the lower cylindrical wall of the hollow cylindrical cavity are respectively provided with avoidance holes for the movement of the second rod portion, the front and rear cylindrical walls of the hollow cylindrical cavity are respectively provided with pin holes, and the second pin is inserted into the pin hole, the first elastic reset member and the second strip hole.

[0021] In some specific embodiments, the trailer gear may have a middle chamber and a side chamber that are isolated from each other, the middle chamber is located in the middle of the trailer gear, the side chamber is arranged on the outside of the middle chamber along the left and right direction, the first elastic stop structure is located in the middle chamber, and the intermediate transmission assembly is arranged in the side chamber.

[0022] In some specific embodiments, the openings of the middle chamber and the side chamber are both facing the front, and the towing device may further include a front cover plate, which is arranged on the front side of the towing gear and covers the middle chamber and the side chamber.

[0023] In some specific embodiments, the operating handle may be a folding handle and includes a folding rod and a vertical connecting rod, the lower end of the folding rod is rotatably connected to the upper end of the vertical connecting rod, and the lower end of the vertical connecting rod is connected to the intermediate transmission assembly.

[0024] A second aspect of the present application provides a towing device, the towing device comprising:

[0025] The above-mentioned trailer assembly;

[0026] The trailer support bracket is provided with a guide rail portion extending in the up-down direction, the guide rail portion is provided with a plurality of clamping limit grooves arranged at intervals in the up-down direction, the side portion of the trailer gear cooperates with the guide rail portion and can move up and down along the guide rail portion, and the locking piece provided on the trailer gear can cooperate with the clamping limit groove in a limited manner.

[0027] In some specific embodiments, the towing device may further include a towing rod bracket and a towing rod, the towing rod is inserted into the towing support bracket along the front-rear direction, the towing support bracket is provided with a support plate capable of supporting the towing rod, and the towing rod bracket is arranged in front of the towing support bracket and connected to the towing rod.

[0028] A third aspect of the present application provides a working machine, which includes the above-mentioned towing device.

[0029] Through the above technical solution, by arranging the first elastic stop structure and the second elastic stop structure between the towing stopper and the towing head, the towing head can be elastically stopped on the towing stopper along the front and rear directions, which is beneficial to eliminate the axial free clearance between the towing stopper and the towing head in the non-towing state, which can not only reduce the shaking amplitude and noise, but also reduce the collision damage between components when the operating machinery is operating to increase the service life.

[0030] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0032] Figure 1 A schematic diagram of the installation structure of a towing device and a rear axle housing according to a specific embodiment of the present application is shown;

[0033] Figure 2 for Figure 1 Schematic diagram of disassembly and assembly of the trailer device and the rear axle housing;

[0034] Figure 3 for Figure 1 Exploded view of the trailer assembly;

[0035] Figure 4 for Figure 3 A schematic diagram of the structure of the rotating connecting rod;

[0036] Figure 5 for Figure 3 A schematic diagram of the structure of the locking member in FIG.

[0037] Figure 6 for Figure 1 An exploded view of the trailer assembly from another perspective.

[0038] Description of Reference Numerals

[0039] 11 Trailer gear 111 Side hole

[0040] 112 Upper hole 113 Middle chamber

[0041] 114 side chamber 115 installation cylinder

[0042] 116 Limit hole 12 Trailer head

[0043] 121 connecting shaft 122 trailer

[0044] 1221 Circumferential limit groove 13 Operating handle

[0045] 131 Folding rod 132 Vertical connecting rod

[0046] 133 third pin 14 locking member

[0047] 141 hollow cylinder 142 avoidance hole

[0048] 143 Pin hole 151 Rotating connecting rod

[0049] 1511 first strip hole 1512 second strip hole

[0050] 152 first pin 153 second pin

[0051] 154 first elastic reset member 16 front cover

[0052] 171 Circlip 172 Fixed Ring

[0053] 173 Axial retaining ring 181 Ball

[0054] 182 Second elastic reset member 2 Trailing support bracket

[0055] 21 Guide rail 22 Clamping limit hole

[0056] 3 Drawbar bracket 4 Drawbar

[0057] 5 Rear axle housing 1 Trailer assembly DETAILED DESCRIPTION

[0058] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0059] The towing head of the existing towing device is usually locked by a nut, which has a large axial gap, is easy to shake and makes a lot of noise.

[0060] For this reason, Figure 3 and Figure 6 As shown, the present application provides a novel towing assembly, which includes a towing stopper 11, a towing head 12, a first elastic stop structure and a second elastic stop structure. The towing head 12 is arranged in the towing stopper 11 along the front-to-back direction, and the first elastic stop structure is arranged between the front end of the towing head 12 and the front side of the towing stopper 11 so that the front end of the towing head 12 elastically stops backwards on the front side of the towing stopper 11. The second elastic stop structure is arranged between the rear end of the towing head 12 and the rear side of the towing stopper 11 so that the rear end of the towing head 12 elastically stops forwards on the rear side of the towing stopper 11.

[0061] In this way, by providing a first elastic stop structure between the towing gear 11 and the towing head 12, the towing head 12 elastically stops backwards on the towing gear 11, which is conducive to eliminating the axial free gap between the front end of the towing head 12 and the front side of the towing gear 11 in the non-towing situation; by providing a second elastic stop structure between the towing gear 11 and the towing head 12, the towing head 12 can be elastically stopped forwards on the towing gear 11, which is conducive to eliminating the axial free gap between the rear end of the towing head 12 and the rear side of the towing gear 11 in the non-towing situation. By eliminating the axial gap between the towing gear 11 and the towing head 12, the shaking amplitude and noise can be reduced, and the degree of collision damage between components can be reduced when the operating machine is operating to increase the service life.

[0062] It should be noted that the structural forms of the trailer stopper 11, the trailer head 12, the first elastic stop structure and the second elastic stop structure can be various. For example, the trailer stopper 11 can be a box cavity structure or a solid body structure; the towing structure of the trailer head 12 can be a hook or a pin, etc.; the first elastic stop structure and the second elastic stop structure can respectively include elastic parts such as springs or elastic stop sheets, and the first elastic stop structure and the second elastic stop structure can be respectively arranged on the trailer stopper 11 or the trailer head 12, and these structural forms should also fall within the protection scope of the present application.

[0063] In some specific embodiments, Figure 3 and Figure 6As shown, the towing head 12 may include a towing portion 122 and a connecting shaft portion 121, the connecting shaft portion 121 is inserted into the towing gear 11, the first elastic stop structure is arranged on the axial front end of the connecting shaft portion 121, the towing portion 122 is connected to the axial rear end of the connecting shaft portion 121 and is located behind the towing gear 11, and the second elastic stop structure is arranged between the front end of the towing portion 122 and the rear side of the towing gear 11. In this way, the structure of the towing assembly can be made more reasonable and simple.

[0064] In some specific embodiments, Figure 3 and Figure 6 As shown, the axial front end of the connecting shaft portion 121 is provided with a first annular groove and a second annular groove spaced apart in the front-rear direction. The first elastic stop structure comprises an elastic retaining ring 171, a fixed circular ring 172 and an axial retaining ring 173. The elastic retaining ring 171 is sleeved on the first annular groove and abuts against the front side of the trailer stopper 11 in the axial direction backward. The fixed circular ring 172 is sleeved on the radial outer side of the elastic retaining ring 171. The axial retaining ring 173 is arranged on the second annular groove and located in front of the elastic retaining ring 171.

[0065] Among them, the elastic retaining ring 171 can be an elastic part such as a half-type spring retaining ring, a round flat retaining ring or a spring pressure plate, which is used to eliminate the axial gap between the axial front end of the towing head 12 and the front side of the towing gear 11. The fixed ring 172 is sleeved on the radial outer side of the elastic retaining ring 171 to radially limit the elastic retaining ring 171 and fix the elastic retaining ring 171 on the first ring groove in the radial direction. The axial retaining ring 173 limits the elastic retaining ring 171 and the fixed ring 172 in the axial direction to prevent the towing head 12 from escaping from the towing gear 11. By providing the elastic retaining ring 171, the fixed ring 172 and the axial retaining ring 173, the strength required for towing a trailer can be provided, and the axial free gap in the non-towing situation can be completely eliminated, which is conducive to increasing the service life of the towing assembly 1 and effectively reducing noise.

[0066] In some specific embodiments, Figure 3 and Figure 6 As shown, the trailer gear 11 is provided with a mounting cylinder 115 for the connecting shaft 121 to pass through, and a plurality of limiting holes 116 are arranged at intervals along the circumferential direction on the rear end surface of the cylinder wall of the mounting cylinder 115, and a ball 181 and a second elastic reset member 182 are arranged in each limiting hole. The second elastic stop structure includes a ball 181 and a second elastic reset member 182 arranged in each limiting hole, and a plurality of circumferential limiting grooves 1221 are arranged at intervals along the circumferential direction on the front end surface of the trailer part 122, and the plurality of circumferential limiting grooves 1221 are arranged one by one with the plurality of limiting holes 116. The connecting shaft 121 is rotatably passed through the mounting cylinder 115, and the ball 181 can be clamped in the circumferential limiting groove 1221 under the elastic force of the second elastic reset member 182.

[0067] Thus, compared with the traditional fixed trailer, the trailer assembly 1 of the present application can realize 360° free rotation. When the tractor is towing the trailer, the trailer and the tractor are often in a state of relative twisting on the road section with relatively bad road conditions. The trailer assembly 1 of the present application can be well adapted to such working conditions, especially in emergencies, such as the trailer overturning. Since the trailer assembly 1 can rotate 360°, the tractor will not overturn due to the overturning of the trailer, thereby improving the safety of the driver. In addition, the elastic positioning structure of the second elastic reset member 182 and the ball 181 is used between the trailer head 12 of the present application and the trailer gear 11, which can realize the rotation positioning function of the trailer assembly 1. At the same time, the second elastic reset member 182 also has the function of eliminating the axial clearance. The trailer assembly 1 will not rotate at will, which is safer to use and will not generate unnecessary noise due to vehicle vibration. Among them, the ball 181 can be a steel ball or other metal material ball.

[0068] The existing towing device's operating handle is usually a rotating handle. When the operator operates the rotating handle, he must complete both the rotating action and the up and down movement. Since the force direction of the rotating unlocking is different from the force direction of the lifting adjustment, when operated with one hand, it is not ergonomic, the operating handle is easy to slip off, and the operation is not safe and stable.

[0069] In view of this, if Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the trailer assembly of the present application also includes an operating handle 13, a locking member 14 and an intermediate transmission assembly arranged on the trailer gear 11. The trailer gear 11 is provided with a side hole 111 on the side along the left-right direction, and the operating handle 13 is arranged in the upper hole 112 and can move in the up-down direction. The upper part of the trailer gear 11 is provided with an upper hole 112, and the locking member 14 is arranged in the side hole 111 and can extend out of the side hole 111 in the left-right direction or retract into the side hole 111. The intermediate transmission assembly is arranged on the trailer gear 11, and one end of the intermediate transmission assembly is connected to the inner end of the operating handle 13, and the other end is connected to the inner end of the locking member 14.

[0070] When the operating handle 13 moves upward, the intermediate transmission assembly can drive the locking member 14 to retract into the side hole 111; when the operating handle 13 moves downward, the locking member 14 can be reset and extend out of the side hole 111. In this way, since the intermediate transmission assembly can drive the locking member 14 to retract into the side hole 111 when the operating handle 13 moves upward, the operator can unlock the locking member 14 by lifting the operating handle 13 upward, so that the unlocking force direction of the trailer assembly is the same as the lifting and adjusting force direction, making the use of the trailer assembly more ergonomic and the operation safer and more stable.

[0071] It should be noted that the shapes and structural forms of the operating handle 13, the locking member 14 and the intermediate transmission assembly can be varied. For example, the operating handle 13 can be a folding handle or a common handle, the locking member 14 can be a solid cylindrical shape or other irregular shapes, etc., the intermediate transmission assembly can be a connecting rod structure or a pulley traction rope structure, etc. These structural forms should also fall within the protection scope of the present application.

[0072] In some specific embodiments, Figure 3 and Figure 6 As shown, the intermediate transmission assembly may include a rotating connecting rod 151 and a first elastic reset member 154. The rotating connecting rod 151 may include a first rod portion and a second rod portion connected to each other, and the angle between the central axis of the first rod portion and the central axis of the second rod portion may be arranged at an acute angle. The connecting portion between the first rod portion and the second rod portion is rotatably connected to the trailer gear member 11, such as Figure 4 As shown, the connection portion between the first rod portion and the second rod portion is provided with a rotating pin hole, and the rotating connecting rod 151 is rotatably connected to the trailer gear 11 through a rotating pin shaft passing through the rotating pin hole, that is, the rotating connecting rod 151 can rotate around the rotating pin shaft.

[0073] The end of the first rod portion away from the connection portion is provided with a first strip hole 1511 extending axially thereof, and the inner end of the operating handle 13 is movably connected to the rotating connecting rod 151 through a first pin 152 movably arranged in the first strip hole 1511, that is, the first pin 152 is respectively arranged in the inner end of the operating handle 13 and the first strip hole 1511, and can move in the first strip hole 1511 along the extension direction of the first strip hole 1511. The end of the second rod portion away from the connection portion is provided with a second strip hole 1512 extending axially thereof, and the inner end of the locking member 14 is movably connected to the rotating connecting rod 151 through a second pin 153 movably arranged in the second strip hole 1512, that is, the second pin 153 is respectively arranged in the inner end of the locking member 14 and the second strip hole 1512, and can move in the second strip hole 1512 along the extension direction of the second strip hole 1512. The “inside” here refers to a position relatively close to the center point of the trailer gear member 11 , and the “outside” here refers to a position relatively far from the center point of the trailer gear member 11 .

[0074] So, like Figure 3 and Figure 6 As shown, when the operator lifts the operating handle 13 upward, the first rod portion is driven to drive the rotating link 151 to rotate, and the second rod portion drives the locking member 14 to move inward to retract into the side hole 111, thereby realizing the unlocking function by applying force in the up and down directions.

[0075] In addition, the first elastic reset member 154 is disposed in the side hole 111, one end of the first elastic reset member 154 abuts against the trailer gear 11, and the other end of the first elastic reset member 154 abuts against the inner end of the locking member 14. In this way, when the operating handle 13 moves upward, the locking member 14 retracts to the side hole 111 and compresses the first elastic reset member 154; when the operating handle 13 moves downward, the first elastic reset member 154 resets and pushes the locking member 14 to extend out of the side hole 111 again, and the up and down adjustment operation is fast and convenient.

[0076] Alternatively, if Figure 5 As shown, the locking member 14 can be a locking pin shaft, and the inner end of the locking member 14 includes a hollow cylindrical cavity 141, and the first elastic return member 154 is inserted in the hollow cylindrical cavity 141. The upper cylindrical wall and the lower cylindrical wall of the hollow cylindrical cavity 141 are respectively provided with an avoidance hole 142 for the second rod portion to move, and the front and rear cylindrical walls of the hollow cylindrical cavity 141 are respectively provided with pin holes 143, and the second pin member 153 is inserted into the pin hole 143, the first elastic return member 154 and the second strip hole 1512.

[0077] Alternatively, in some other specific embodiments, the intermediate transmission assembly may include a traction rope, a fixed pulley, and an elastic reset member, wherein the two ends of the traction rope are respectively connected to the inner end of the operating handle 13 and the inner end of the locking member 14, and are wound around the fixed pulley. The elastic reset member is arranged in the side hole 111, one end of which abuts against the towing gear 11, and the other end abuts against the inner end of the locking member 14. In this way, when the operating handle 13 moves upward, the locking member 14 is pulled back to the side hole 111 and the elastic reset member is compressed by the traction rope when the operating handle 13 moves upward; when the operating handle 13 moves downward, the elastic reset member is reset and pushes the locking member 14 to extend out of the side hole 111 again, and the unlocking function of applying force in the up and down directions can also be realized.

[0078] Optionally, the trailer gear 11 has a middle chamber 113 and a side chamber 114 that are isolated from each other, the middle chamber 113 is located in the middle of the trailer gear 11, and the side chamber 114 is arranged outside the middle chamber 113 in the left-right direction, the front end of the trailer head 12 is inserted into the middle chamber 113, and the intermediate transmission assembly is arranged in the side chamber 114. Figure 3As shown, the trailer gear 11 includes a middle chamber 113 and two side chambers 114. A side chamber 114 is provided on each of the left and right sides of the middle chamber 113. The three chambers are isolated from each other and do not affect each other. An upper hole 112 is provided on the top of the trailer gear 11 along the left and right sides respectively. The two inner ends of the operating handle 13 extend into the two upper holes 112 respectively. The two upper holes 112 are connected to the two side chambers 114 respectively. Each side chamber 114 is provided with an intermediate transmission assembly. The two inner ends of the operating handle 13 are connected to the intermediate transmission assemblies in the two side chambers 114 respectively. The two side holes 111 are connected to the two side chambers 114 respectively. The inner ends of the locking member 14 in the side holes 111 on the left and right sides of the trailer gear 11 are connected to the intermediate transmission assemblies in the two side chambers 114 respectively. In this way, the intermediate transmission assembly is arranged in the side chamber 114, which avoids damage or jamming during use and makes the structure more reliable.

[0079] Optionally, the openings of the middle chamber 113 and the side chamber 114 are both facing the front side, and the trailer assembly 1 further includes a front cover plate 16, which is disposed on the front side of the trailer gear 11 and covers the middle chamber 113 and the side chamber 114. In this way, the intermediate transmission assembly and its associated motion mechanism can be sealed to avoid exposure to harsh working environments, and will not be stuck or damaged due to factors such as mud and iron filings.

[0080] In some specific embodiments, Figure 3 and Figure 6 As shown, the mounting cylinder 115 is connected to the middle chamber 113, and the axial front end of the connecting shaft 121, the elastic retaining ring 171, the fixing ring 172 and the axial retaining ring 173 are arranged in the middle chamber 113, which can avoid being exposed to harsh working environments and will not be damaged by factors such as sludge and iron filings.

[0081] In some specific embodiments, Figure 3 and Figure 6 As shown, the operating handle 13 can be a folding handle and includes a folding rod 131 and two vertical connecting rods 132. The folding rod 131 is inverted U-shaped and the two lower ends are rotatably connected to the upper ends of the two vertical connecting rods 132 through third pins 133, and the lower ends of the two vertical connecting rods 132 are respectively connected to the two intermediate transmission components. In this way, the structure of the trailer assembly 1 can be made more compact and reasonable, and the operating handle 13 is a hand-held joystick that can be operated with one hand.

[0082] The second aspect of the present application further provides a towing device, which includes the above-mentioned towing assembly 1. Since the towing device includes the above-mentioned towing assembly 1, it also has all the technical effects brought by the towing assembly 1, so it will not be repeated.

[0083] Optionally, the towing device further includes a towing support bracket 2. The towing support bracket 2 may be provided with a guide rail portion 21 extending in the up-down direction, and the guide rail portion 21 may be provided with a plurality of clamping limit holes 22 arranged at intervals in the up-down direction. The side of the towing stopper 11 cooperates with the guide rail portion 21 and can move up and down along the guide rail portion 21, and the locking member 14 can be limitedly cooperated with the clamping limit holes 22. Figure 1 and Figure 2 As shown, the trailer support bracket 2 includes a left longitudinal frame body and a right longitudinal frame body that can be connected to the rear axle housing 5 and are relatively spaced apart. The left longitudinal frame body and the right longitudinal frame body are respectively provided with guide rails 21 on the opposite inner sides. The two side parts of the trailer stopper 11 are correspondingly matched with the two guide rails 21. When the operating handle 13 is pulled up, the locking members 14 on both sides of the trailer assembly 1 are retracted into the side holes 111, and the trailer assembly 1 can move up and down along the guide rails 21 to adjust the height of the trailer assembly 1. When the locking members 14 on both sides of the trailer assembly 1 extend out of the side holes 111, the trailer assembly 1 can be clamped on the clamping limit hole 22, thereby achieving position fixation in the up and down direction.

[0084] In some specific embodiments, the towing device may further include a towing rod bracket 3 and a towing rod 4, wherein the towing rod 4 is inserted into the towing support bracket 2 along the front-rear direction. Figure 1 and Figure 2 As shown, the trailer support bracket 2 is provided with a support plate and a limit plate, the limit plate is located above the support plate, and the limit plate and the support plate are respectively connected between the bottom of the left longitudinal frame and the right longitudinal frame. The traction rod 4 is arranged in the guide space surrounded by the support plate, the left longitudinal frame, the limit plate and the right longitudinal frame along the front-back direction. The support plate can support the traction rod 4, so that the force of the traction rod 4 is more uniform, the overall strength of the traction structure is higher, and the performance of the traction structure is effectively improved, and the limit plate can limit the traction rod 4 and the trailer assembly 1 respectively. The traction rod bracket 3 is arranged in front of the trailer support bracket 2 and is assembled and connected with the traction rod 4 through a pin shaft. The traction rod 4 can realize axial telescopic hooking of the trailer, which can meet different types of trailers, wherein the traction rod bracket 3 is used to achieve fixation. The trailer assembly 1 is suitable for transportation or operation occasions, such as transporting agricultural products, farming, etc. The traction structure is suitable for occasions where it is necessary to drag the operation equipment for operation, such as dragging the rice transplanter, plow, etc. for agricultural operations.

[0085] Optionally, elastic buffer plates may be provided on the support plate, the left longitudinal frame, the limit plate and the right longitudinal frame relatively close to the towing rod 4, thereby reducing the degree of collision damage between the towing rod 4 and the towing support bracket 2, further reducing the operating noise of the towing device, and increasing the service life of the components.

[0086] The third aspect of the present application also provides a working machine, which includes the above-mentioned trailer. Since the working machine includes the above-mentioned trailer, it also has all the technical effects brought by the trailer, so it will not be repeated. Among them, the working machine is mainly used as an agricultural working machine, and can also be used as an engineering working machine. The agricultural working machine can be, for example, a tractor, a harvester, etc.

[0087] Alternatively, if Figure 1 and Figure 2 As shown, the working machine further comprises a rear axle housing 5, and the towing support bracket 2 and the drawbar bracket 3 are respectively assembled on the rear axle housing 5 of the tractor.

[0088] It should be noted that the structure of the rear axle housing 5 is well known to those skilled in the art and does not belong to the core improvement part of the present application, so it will not be described here in detail.

[0089] The following is a brief description of the working principle of the towing device of the present application: the operating handle 13 is folded to be vertically upward and lifted upward, the vertical connecting rod 132 drives the rotating connecting rod 151 to rotate around the rotating pin, the locking member 14 moves in the left and right directions, compressing the first elastic reset member 154, and when the locking member 14 is completely retracted into the side hole 111, the towing assembly 1 can move up and down on the towing support bracket 2 along the double-sided slide rails. After moving to the predetermined position, hold the towing assembly 1 with one hand and release the operating handle 13 with the other hand, the locking member 14 is pushed out by the first elastic reset member 154 and enters the clamping limit hole 22 of the left and right longitudinal frames to complete the position adjustment. Folding the operating handle 13 90° can save more space.

[0090] In summary, the unlocking force direction of the trailer assembly of the present application is the same as the lifting and lowering force direction, which is more ergonomic and safer and more stable to operate. The trailer head 12 of the present application and the trailer gear 11 use an elastic positioning structure combining a second elastic reset member 182 and a ball 181, which can realize the 360° free rotation and rotation positioning function of the trailer assembly 1. At the same time, the second elastic reset member 182 also has the function of eliminating the axial clearance. The trailer assembly 1 will not rotate at will, which is safer to use and will not generate unnecessary noise due to vehicle vibration. In addition, by setting a sealed chamber in the trailer gear 11, the motion mechanism can be completely sealed, and it will not be stuck or damaged due to factors such as sludge and iron filings, and the structure is more stable and reliable.

[0091] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A trailer assembly, characterized in that: include: Trailer gear (11); A trailer head (12) is inserted into the trailer stopper (11) along the front-rear direction; A first elastic stop structure is arranged between the front end of the towing head (12) and the front side of the towing stopper (11) so that the front end of the towing head (12) elastically stops backwards on the front side of the towing stopper (11); A second elastic stop structure is arranged between the rear end of the towing head (12) and the rear side of the towing stopper (11) so that the rear end of the towing head (12) elastically stops forward on the rear side of the towing stopper (11).

2. The trailer assembly according to claim 1, characterized in that: The towing head (12) comprises a towing portion (122) and a connecting shaft portion (121), wherein the connecting shaft portion (121) is inserted into the towing gear (11), the first elastic stop structure is arranged on the axial front end of the connecting shaft portion (121), the towing portion (122) is connected to the axial rear end of the connecting shaft portion (121) and is located behind the towing gear (11), and the second elastic stop structure is arranged between the front end of the towing portion (122) and the rear side of the towing gear (11).

3. The trailer assembly according to claim 2, characterized in that: The axial front end of the connecting shaft portion (121) is provided with a first annular groove and a second annular groove which are arranged at intervals in the front-to-back direction; the first elastic stop structure comprises an elastic retaining ring (171), a fixed circular ring (172) and an axial retaining ring (173); the elastic retaining ring (171) is sleeved on the first annular groove and abuts against the front side of the towing gear (11) in the axial direction backward; the fixed circular ring (172) is sleeved on the radially outer side of the elastic retaining ring (171); and the axial retaining ring (173) is arranged on the second annular groove and is located in front of the elastic retaining ring (171).

4. The trailer assembly according to claim 2, characterized in that: The towing gear (11) is provided with a mounting cylinder (115) for the connecting shaft (121) to pass through, and a plurality of limiting holes (116) are arranged at intervals along the circumferential direction on the rear end surface of the cylinder wall of the mounting cylinder (115), and the second elastic stop structure comprises a ball (181) and a second elastic reset member (182) arranged in each of the limiting holes, and a plurality of circumferential limiting grooves (1221) are arranged at intervals along the circumferential direction on the front end surface of the towing portion (122), and the plurality of circumferential limiting grooves (1221) are arranged one by one with the plurality of limiting holes (116), and the connecting shaft (121) is rotatably passed through the mounting cylinder (115), and the ball (181) can be clamped in the circumferential limiting groove (1221) under the elastic force of the second elastic reset member (182).

5. The trailer assembly according to claim 1, characterized in that: The trailer stopper (11) is provided with a side hole (111) along the left-right direction of the side, and the upper part of the trailer stopper (11) is provided with an upper hole (112). The trailer assembly further includes: An operating handle (13) is disposed in the upper hole (112) and is movable in an up-and-down direction; A locking member (14) is disposed in the side hole (111) and is capable of extending out of the side hole (111) in a left-right direction or retracting into the side hole (111); An intermediate transmission component is arranged on the towing gear (11), one end of the intermediate transmission component is connected to the inner end of the operating handle (13), and the other end is connected to the inner end of the locking member (14); When the operating handle (13) moves upward, the intermediate transmission assembly can drive the locking member (14) to retract into the side hole (111); when the operating handle (13) moves downward, the locking member (14) can be reset and extend out of the side hole (111).

6. The trailer assembly according to claim 5, characterized in that: The intermediate transmission assembly comprises: A rotating connecting rod (151) comprises a first rod portion and a second rod portion connected to each other, wherein the connecting portion between the first rod portion and the second rod portion is rotatably connected to the towing gear (11), an end of the first rod portion away from the connecting portion is provided with a first strip hole (1511) extending axially thereof, an inner end of the operating handle (13) is movably connected to the rotating connecting rod (151) via a first pin (152) movably arranged in the first strip hole (1511), an end of the second rod portion away from the connecting portion is provided with a second strip hole (1512) extending axially thereof, and an inner end of the locking member (14) is movably connected to the rotating connecting rod (151) via a second pin (153) movably arranged in the second strip hole (1512); A first elastic return member (154) is arranged in the side hole (111), one end of the first elastic return member (154) abuts against the towing gear member (11), and the other end of the first elastic return member (154) abuts against the inner end of the locking member (14).

7. The trailer assembly according to claim 6, characterized in that: The locking member (14) is a locking pin shaft. The inner end of the locking member (14) includes a hollow cylindrical cavity (141). The first elastic return member (154) is inserted into the hollow cylindrical cavity (141). The upper cylindrical wall and the lower cylindrical wall of the hollow cylindrical cavity (141) are respectively provided with avoidance holes (142) for the second rod to move. The front and rear cylindrical walls of the hollow cylindrical cavity (141) are respectively provided with pin holes (143). The second pin member (153) is inserted into the pin hole (143), the first elastic return member (154) and the second strip hole (1512).

8. The trailer assembly according to claim 5, characterized in that: The trailer gear (11) has a middle chamber (113) and a side chamber (114) which are isolated from each other, wherein the middle chamber (113) is located in the middle of the trailer gear (11), and the side chamber (114) is arranged on the outside of the middle chamber (113) in the left-right direction, the first elastic stop structure is located in the middle chamber (113), and the intermediate transmission assembly is arranged in the side chamber (114).

9. The trailer assembly according to claim 8, characterized in that: The openings of the middle chamber (113) and the side chamber (114) are both facing the front side. The trailer assembly (1) also includes a front cover plate (16). The front cover plate (16) is arranged on the front side of the trailer gear (11) and covers the middle chamber (113) and the side chamber (114).

10. The trailer assembly according to claim 5, characterized in that: The operating handle (13) is a folding handle and comprises a folding rod (131) and a vertical connecting rod (132); the lower end of the folding rod (131) and the upper end of the vertical connecting rod (132) are rotatably connected, and the lower end of the vertical connecting rod (132) is connected to the intermediate transmission assembly.

11. A towing device, characterized in that: The towing device comprises: The trailer assembly (1) according to any one of claims 1 to 10; A trailer support bracket (2), wherein the trailer support bracket (2) is provided with a guide rail portion (21) extending in the up-down direction, the guide rail portion (21) is provided with a plurality of clamping limit holes (22) arranged at intervals in the up-down direction, the side portion of the trailer gear (11) cooperates with the guide rail portion (21) and can move up and down along the guide rail portion (21), and the locking member (14) provided on the trailer gear (11) can cooperate with the clamping limit hole (22) in a limited manner.

12. The towing device according to claim 11, characterized in that: The towing device further comprises a towing rod bracket (3) and a towing rod (4); the towing rod (4) is inserted into the towing support bracket (2) along the front-rear direction; the towing support bracket (2) is provided with a support plate capable of supporting the towing rod (4); the towing rod bracket (3) is arranged in front of the towing support bracket (2) and is connected to the towing rod (4).

13. A working machine, characterized in that: Comprising a towing device according to claim 11 or 12.

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